Pipe-joint.



O. WESTPHAL- PIPE JOINT.

APPLICATION FILED NOV. 15, 1912. I

Patented Dee.31,1912.

via/l! Ill/Ir!!! Ml-f/ENTU/F ohm PIPEJGINT.

Specification of Letters Patent.

Linrzro, GERMANY.

lotentod on. :n l in 2.

' Application filed November 15. 1912. Serial No- 731.5711

To all whom it may concern lie it known that l, CARL lYES'lIHAL, =1 subjcct of the King; of Prussia, residing; at i 16 Kaiser Wilhelm strasse, Leipzig, Gel many, have invented a certain new and useful Improved .PipoJoint; and 1 do hereby declare the following to be a full, clear, and exact; description of the. inventii' n.

My invention relates; to on improved pipojoint for branch pipes. ln known l joints of this kind the brunch-pipe has been 1 provided with lugs, and the noun pipe has l had, at the edge of the opening receiving the branch pipe, slots or recesses corro- Fspondii'ig with said lugs. filter the lugs enter the slot. the branch pipe is rotated so that the said lugs-1 pass; under the edge of the. said opening in tho uniiu pipe. This joint lS' lIl fact a inorliticd bayonet. joint. For practical Work such a method is not feasible.

. In the casc of stool or cunt-iron pipes with which it is desired to etlcct connection after the main pipc 'hao been laid in its trcnch the slots or recesses nt the edge of the opening have usually to be cut in after boring, and this must bra done after the boring tackle has been dismantled. It is not in practice possible to perinifsnch a complicated operation in tho-case of pipes already laid for gas, water or cum. llivcn whom the pipe micralion costly,

in not 11 n l bio and nearly aloccup cog: ll. .rn Ways lr n to some injury being; done to tho ipe. 'eovc... thc b. ooh pipo has iicon tail there is nothing to stop it .cd tooftar, and the lugs can r easily be again brought. 0;)- positc rocc is. no that. their engagement with. tho cdg'co :he aperture inthe n'uiin pipe lost. it has also been proposed to fasten. the ends or tub-cs into tubowalls by using an anchor-plate which introduced by being inclined somewhat, but such an arrangement would not generally be applicable to branch pipe connections because not i only would several somewhat elongated holes mood to be made in the main pipe thereby considerably wculrcningr it, but, owing to the presence of the unchonplutc, the section both of the main .lIlCl branch pipe would be reduced.

'A primary object of my lIlVtlllllOl! is to obviate the above defects, and to this end g rt.

c therciom I arrange firstly, that the main pipe has nothing but a round holc, which can of coln'sc hc forn'icd by any suitable boring appliance, secondly. that the branch pipe has such lugs that they can be passed to the rearol the wall of the main pipe, and can HILLS engage bchind the opening in this pipe,

and thirdly. that the branch pipe. carries :1

. sleevedike clamping nut to secure the joint.

The lugs engaging below the edge of theopening in the main pipe will then prevent the branch pipe from again coming out.

Some illustrative embodiments of my invention are diagrammatically represented by way of example in the accompanying drawing, u'hcrcin Figure 1 is a sectional view of the. pipes showing the position of the branch pipe when about: to be introduced into the main pipe, Fig. 2 a sectional view when the same pipes are. correctly placed, Fig. 3 a plan View of the branch pipe, Fig. 4 a longitudinal section of a branch pipe having lugs of a slightly modified form, and Fig. 5 a similar section of a branch pipe. having lugs shouldered down to centralize the branch pipe in the main pipe.

The main pipe 0. has bored therein a round hole. 0 the diameter of which is consirlembly less than the overall diameter of the branch pipe head at; the lugs d, cl (Fig. 3 Into this aperture 0 the head of the branch pipe is introduced by tilting the latter so that, as shown in Fig. l, first, one log (I is engaged beneath the edge of the hole 0 and the pipe 6 then swung in the direction of the arrow until it is in substantiul alincinent with the axis of the hole and the. other lug J has entered the latter.

ll pon the adjustment of the pipe I), centrally of the hole a, the lugs engage the inner face of the main pipe at opposite, sides of the hole, (Fig. 2). The. sleeve-like nut c threaded on the branch pipe adjacent; its head is then screwed down against. the outer of the main pipe to makethe. joint mechanically secure. Any suitable joint clolllii "sure, such as a packing ring f, is arranged,

- between the nut and the main pipe to render the joint gas'or liquid tight, as may be.

To facilitate the centering of the branch pipe in the hole a and to insure its remaining in centered position," the retaining lugs are preferably suitably, formed on their en-- gaging faces, for this purpose. Thus in Fig; 4. they are shown as having their engaging faces inclined, while in Fig. 5 they are stepped or shouldereddown.

I claim 1. A branch pipe jiointcomprisin a mainpipe with circular. aperture bore in the wall thereofla branch pi having, a head with lugs rigidly outstandiiig'in' fixed position on the opposite sides thereof, the overall diameter of said branch pipe head'at the lugs exceeding the diameter of the circular aperture. in the main pipe, but bein" such as to permit the introduction of said ranch pipe head through said aperture-by inserting one lug through ,the aperture while the branch pipe is in angi'llar positionand then swinging the litter into.substantial alinement'with the aitis 'o'fith'e hole'so as to pass the otherl glug through" the "latter, a nut threaded Kim said branch pipe} and fmeans engaged said'nnt' andniain pipe to seal the'joint'when flieSnutistight'ened;

2. A branch jointcomprising a main pipe with circular aperture bored in the wall thereof, a branch pipe havin'g'a-head with lugs rigidly outstanding in fixed position on the oppositefsidesthereof, the overall diameter of said branch pipe head at the lugs exc'eeding the diameter of the circular aperture in the main pipe, but being such'as to permit I the introduction ,of said branch pipe head through said aperture by inserting one lug is in angular position and then. swinging t 0 through the aperture while the branch pipe latter into substantial alinement with the axis of the hole so as to pass theother in through the latter, a nut threaded on sai branchi pipe and means engaged between said nut and main pipe to seal the joint when the nut is tightened, together with. means for centering said branch pipe head in the aperture in the main pipe.

3. A branch pipejoint'comprising a main pipe with circular aperture bored in the wall thereof, a branch pipe having a head with lugs rigidly outstanding infixed position on the opposite sides thereof, the overall diameter of said branch pipe head at the lugs 'ex" ceeding the diameter of the circular aperture in the main pipe, but being such as't'o permit the introduction of said branch pipe head-through said aperture by inserting one lug through the aperture while .the branchpipe is in angular position and then swingin the latter i'nto substantial "aiinement with'the axis of the hole so as to pass the other lug through the' latter,- a nut threaded use on said branch pipe and means engaged tween said nut and main pipe to seal the-,-

ioint when the nut is tightened, said lugs be? ing shaped on the faces thereof which gage the edges of the aperture in the main pipe tocenter said branchpipe with roll 

